US1604635A - Typewriting machine - Google Patents

Description

` Oct. 26 1926. 1,604,635

C. BQ CORCORAN ET AL.

TYPEWRITING MACHINE rginal Filed Dec. 30. 1922 Patented (ict. 2b, i926.

UNITED stares Partnr orrice- CORITELTUS Bi CORCORAN, DECEASED, LATE OF NEW YORK, l'. Y.; BY MICHAEL L GRCORAN, ADMINISTRATOR, GF BROOKLYN, AND F BROOKLYN, NEW YORK, ASSGNQRS TO 'UNDER/WOOD ALFRED G. F. KROWSKI, TYPEW'RITER COMPANY,

CF NEV YORK, l\T. Y., .A CORPORATION OF DELAWARE.

'ryrnwnrrrne :vinci-Irren.

@riginal application lediDecember 30, 1922,.v Serial No. 609,793. Divided and this application filed January'12, 192,8. Seria-1 No. 80,692.

This invention relates to means for facilitating the operation of a line-'spacing mechanism of a typeiwriting machine in a Sound- `deadening casing, with the line-spacing 5 mechanism readily operable from the eX- terior of the casing.

In the Underwood portable typewriting `machine, the line-spacing mechanism is mounted at the rear part of the machine, so that when the machine is placed in a sounddeadening casing the line-spacing mechanism is much nearer the top and rear than the front of thecasing. A feature of the present invention relates to the Aprovision of a line-space lever extending through the top of the casing, and so mounted on the carriage that it Vwill readily operate the line-spacing mechanism, the lever being attachable to or detachable from the carriage when the latter is used with or without a sound-deadening casing.

Another feature of the invention is the provision of a bracket attached to the carriage and upon which the line-space lever is 25 pivoted,`there being no` changes necessary on the carriage for attaching the bracket and the line-space lever thereto. Means is provided on the bracket to co-operate with means on the line-space lever for limiting and steadying the movement of the latter. The means may comprise an outwardly-extending` arm on the bracket having shoulders for engagement with a pin on the line- Space lever thereby -determining the throw of the lever.

This application is a division ofapplication, Serial No. 609,793, filed December 30, 1922.

Other features and advantages will hereinafter appear. n

In the accompanying drawings,

Figure 1 -is a cross-sectional view through the center of a sound-deadening casingl and a typewriting machine therein with the invention applied thereto. f

Figure `2 is a front view of the line-space mechanism, showing the line-space lever and the supporting bracket therefor.

l0 on the line 3-3 of Figure 2.

Figure 3 is a view, in side elevation, taken divided longitudinally by a plate 11, which extendsy from one `to the other of the` side walls 12 of the casing. The plate 11 iso'- set at its lower edge to form a fiange13,y through which are passed wood screws `14, securing the plate to the base 15 of the bodypart of the casing. The -plate 11 may be further braced by meansof a strip 16 eX- ten-ding longitudinally thereof on the base 15. A similar strip 17 may be extended from side to side of the body-part, yat` the forward edge thereof, where thecover engages the base. The plate 11together with the rear wall 18of the part 10, andthe side walls of the latter, forms an interior lchamber adapted to receive the main frame 19 and thecarriage 20 of a typewriting ma# chine. The keyboard-extension. 21 ofthe machine protrudes through, and forward of, the plate 11, so that thekeyboard may be accessible when the outer cover (not shown) is removed. This interior chamber has the rear wall thereof lined with' sound-deadening material 22; the side walls thereof with sound-dea-dening material 23; thebase thereof with sound-deadening material 24; and the front thereof with sound-deadening material 25, which latter is suitably secured to the plate 11. This interior chamber is also provided with a cover 26, adapted to be swung up from its normal position, in which position access may be had to the machine, for erasures and the like.

For centering and holding the machine to the casing `base 15, the rear feet 27 ofthe machine are moved into brackets 28 and the front feet 29 into disks 30. The front of the machine is locked against upward movement by a plate 3l, secured to the upper edge of the plate 11, andy which crosses over, and fits down upon, the front plate 32 of the machine. This plate 31 is provided with a sound-deadening lining 33 and forms an upward continuation yof the front `wall .of the interior chamber to the lower front edgeV fouling ot the paper, in the machine, on the lining 3d as the carriage is nioved in lettereed and return directions.

The lower edges ol' the side lining-ineinbers 36 of the cover are `held by strips ln the front ot the cover is a window, through which the witing on the platen may be observed. L window-pane or' glass or other transparent inaterial, is set into a traine provided therefor in the coverln the drawings, the pane is shown as comprising superposedsheets of glass 38 and 39. At the lower end et the window is a cushion 40,' which rests upon an offset il on the upper edge of the removable iront plate 3l, when the cover is in norinal position.r

Since the machine is to be operated in the sound-proof inner casing, and since the side walls l2 of the casing-part l() forni also the side walls oft the interior sound-prooi chainber, the length of the several parts of the casing must be such as toallow for full movement of the carriage in letter-feed and return directions onthe machine. Secured to the carriage, however, are various operating levers and arms which should be accessible from the outside ot the sound-prooi' chamber. @ne of these levers comprises a line-space lever 42 (and is the only one t yshown in the drawings). lt these levers ar to project-to the outside et the sound-prooi chamber, the llatter inust be slotted to perniit them to travel therealonp; with the carriage.' Such a slot is shown at i3 in the cover at the rear of the window-pane. Resilient cushions del are provided which come together to close the slot, except at the points wberethe levers protrude therethrough.

The line-space mechanism in the Underwood standard portable typewriter consists of a. ratchet-wheel 45, tast on the shaft fl of the platen ll?. A pawl 48, for actua-ting the ratchet-wheel, is mounted on a slide 49, connected to one arm 50 ot a bell-crank-lever, pivoted at 5l on the carriage-traine. The other arin 52 of the bell-crank lever projects forward and termina-tes in a iinger-piece within the interior sound-prooi' chamber. This finger-piece is adapted to be engaged and operated by the lever e2, which projects through the-slot i3 to the outside of the cover. The lever 4t2 is pivoted at 54C to an ear 5, forming part of a bracket 55. The bracket 5G has :torined thereon, at the right-hand end thereof, an ear vor prong` 57, bent over, in the i'orin of a hook, .to engage the upper edge'oi the side piece 5S ot the carriageran'ie at the forward part et the saine, and to support the bracket 55 upon the carriagera-ine at this point. has a side piece or plate 59, which entends from the iront of theV platen, alongside the side plate 58 of the carriage, under the platen-aXle, to the rear ot the latter. Near the Vforward part ot the bracket-extension 59,

The bracket 56 alsoV substantially directly below the hook 5T, a headed screw 6() is threaded into the brac-ketextension 59, near the under edge ot the carriage side piece 58, in such position that, when the screw is tightened, the head thereof will overlap and bear against the carriage side piece 58, thereby assisting the hook 57 in holding' Ythe bracket to the carriage. Siniilarly, at the rear of the bracket-extension 59, another headed screw 6l is threaded into the saine, alongside the lower rear edge or the carriage side piece, and in such position that, when the screw 5l is tightened, the head thereof will overlie, and bear against, the side plate ot the carriage, thereby furnishing` an additional anchor for the bracket 56 at the rear of the platen. The screw 60 is turned into the bracket trein the right-hand side thereof, whereas thevscrew 6l is turned into the bracket trein the lett-hand side thereof; the bracket being` thus engaged troni both sides et the carriage side plate. ilo permit the head of the screw 6l to engage the carriage side plate at the lett-hand side tl erect, the bracket-extension 59 is offset rlei'tvward, at 62, to brinp,`v it, at 63, to the plane ot the outer or lett-hand portion of the carriage side plate. rl`he portion 53 ot the bracket-extension 59 inay have a further lett-ward lip or oiiset 6ft, the end or which is flush with the outer surface o the bracket side plate, so that the Vhead oii the screw (El, by engagement therewith, and with the outer tace of the bracket side plate, niay automatically and correctly position the bracketextension 59 with respect to the carriage side plate. that, although the bracket 56 is securely anchored at three points, and in diiierent planes to the carriage side plate, there are no special attachments on the latter for the bracket, nor are there any screw-holes required in the carriage side plate iter attachnient ot the bracket.

That reach et the b acket, to which the lever 42 is pivoted, extends lengthwise ot the platen-axle, at right angles to the rearward bracketextension 59, and thence downward with a rearward offset to the pivot-point 54C ot the lever The bracket has another prong' or extension (S5, at the iront thereof, lengthwise of the platen-axle. rEhe upper edge ot the bracket-extension '55 is cut away at 6G, on a. curve struck troni the pivot-point 5a; and the lever 42 carries a pin G7, adapted to travel along;` the curved edge ot the recess G6, and to engage shoulders 68 and G9, respectively, at the right and lett hand ends of the recess G6, to determine the throw oi the lever l2 in either direction. To steady the lever ll2 on its pivot 5l, against forward and rearward angular inoveinent, the pin 67 is provided with a head 170, to engage with the rear face of the bracket-extension 65. f

lt will be noted troni the foregoing llt) The lever 42, which is operable from the exterior of the casing, is attached to the machine in such anmanner that no changes have to `be made to the standard parts of the machine which is advantageous since it renders the machine readily adaptable for use with or without a` casing. The regular line-space arm 52, which terminates in the finger-piece 53, remains on the `machine when the latter is to be operated in a sounddeadening casing.I rlhe lever a2 is so attached to the machine that when operated from-:the exterior of the casingits lower part will engage and operatethe arm 52 in the interior of the casing in a similar man.

ner that the operator would engage and opcrate the arm when the machine is used without the casing, in which case the lever l2 an easily be removed from the machine.

Tariations may be resorted to within the cope of the invention, and portions of the improvements may be used witho'ut others.

rlaving thus described the invention, we claim: 1

l. ln a typewriting machine, a platen, a platen-carriage having side plates beyond the ends of the platen, line-space mechanism vcomprising ratchet-wheel, a pawl for engagement with the ratcliet-whcel, a lever for actuating` the pawl, engage and operate the first lever and to protrude through a slot in a sound-deadening casing for the machine, and a bracket on which the second lever is pivoted; the

bracket being attachable to the sideplate ofv the carriage.

2. ln a typewriting machine, a platen, a platen-carriage having side plates beyond the ends of the platen, line-spacemechanism comprising a ratchet-wheel, a pawl for engagement with the ratchet-wheel, a lever for actuating the pawl, another lever adapted to engage and operate the first lever and to protrude through a slot in a sound-deadening casing for the machine, a bracket on which the second lever is pivoted, and means exclusively confined to the bracket for attaching the bracket to the side plate of the carriage.

3. in a typewriting machine, a platen, a platene'carriage having side plates beyond the ends of the platen, line-space mechanism vcomprisinga ratchet-wheel, apawl for engagement with the ratchet-wheel, a lever for actuating the pavvl, another lever adapted to engage and operate the first lever and to pr0- trude through a slot in a sound-deadening casing for the machine, a bracket on which the second lever is pivoted, means exclusively con'lied to the bracket for attaching the bracket to the side plate of the carriage, such attaching means consisting of an offset or hook on the bracket adapted to be hung on the carriage side plate, and a headed screw on the bracket adapted when tightened to Vcned to engage the another lever adapted to overlie and engage the face of the carriage side plate at the edge of the latter.

, 1l. In a typewriting machine, a platen, a

platen-carriage having ,sidel plates beyond the ends of the platen, line-space mechanism comprisinga ratchetavheel, a pawl for engagement with the ratchet-wheel, a lever for actuatingthe pawl, another lever adapted `to engage and operate the lever-and to protrude through a slot in the second lever is pivoted, .means excluthefbracket to the side plate of the carria'e, such attaching means consisting of an offset or hook on the bracket adapted to be hung on the carriage side plate, and headed screws adapted to overlie and when tightface of the carriage side plate, respectively at the front and rear edges thereof. Y

5. In a typewriting machine, a platen, a platen-carriage havingv side plates beyond the ends of the platen, line-space mechanism comprising` a ratchet-wheel, a pawl for engagementwith the ratchet-wheel, aleverV for actuating the pawl,fanother lever adapted to engage and operate the first lever and to protrude through a slot in a sound-deadening casing for the machine, a bracket on which the second lever is pivoted, means eX- clusively confined to the bracket for attach-` ing the bracket to the side plate of the carriage. such attaching means consisting of an offsetl or hook on the bracket adapted to be hung on the carriage side plate, and headed screws adapted tov overlie-and when tightened to engage the face of the carriage side plate, respectively at the front and rear edges thereof, one of the screws engaging the carriage side plate on the right-hand side thereof and the other of the screws-engaging the carriage side plate on the left-hand side thereof.

6. In a typewriting machine, a platen, a platen-carriage having side plates beyond the ends of the platen, line-space mechanism comprising a ratchet-wheel, a pawl for engagement with the ratchet-wheel, a lever for actuating the pawl, anotherlever adapted to engage and operate the first lever and to protrude vertically upward through a slot in the top of a sound-proof casing for the ma-v a smindfdeadening`v casing for the machine, a bracket on which chine, and a bracket on which the second lever is pivoted; the bracket being` attachable to theside plate of the carriage and hav ingfaportion parallel to the axis of the platen, and the Second lever having a headed pin thereon adapted, when the lever is actuated, to ride upon the edge'oiI such portion of the bracket, with the bracket between the lever and the head of the pin, whereby the lever is keteadied against forward and rearward angular displacement.

8. ln a .typewriting machine, a, platen, a

v platen-carriage ,having side plates beyond the ends of the platen, line-Space mechanism fzomprising a ratchet-Wheel, a pawl lfor engagmncnt with thevratchet-Xvheel, a lever for actuating the pawl, another lever adapted to engage and operate the first lever and to protrude through a slot in a sound-deadening casing for the machine, and a bracket on Ywhich the second lever is pivoted; the

MCl-IAEL J. CORCORAN, Administrator of the Estate of Cornelius E.

Corcoran, deceased.

ALFRED e. r. KUnovveKi.

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